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SIRIUS

Position Switches with Separate Actuator

Operating Instructions

Read and understand these instructions before installing, operating, or

maintaining the equipment.

DANGER

Hazardous voltage.

Will cause death or serious injury.

Disconnect power before working on equipment.

Reliable functioning of the equipment is only ensured with certified

components.

Important notice

The products described herein are designed to be components of a

customized machinery safety-oriented control system. A complete

safety-oriented system may include safety sensors, evaluators, actua-

tors and signaling components. It is the responsibility of each company

to conduct its own evaluation of the effectiveness of the safety system

by trained individuals. Siemens AG, its subsidiaries and affiliates (col-

lectively "Siemens") are not in a position to evaluate all of the charac-

teristics of a given machine or product not designed by Siemens.

Siemens accepts no liability for any recommendation that may be

implied or stated herein. The warranty contained in the contract of sale

by Siemens is the sole warranty of Siemens. Any statements contained

herein do not create new warranties or modify existing ones.

Design / Operating principle

When the wire cable is pre-stressed, the contacts 21-22 are closed and

the contacts 13-14 are open. When the wire cable is being pulled or if it

breaks, the contacts 21-22 are opened and the contacts 13-14 are

closed. In the case of cable-operated switches with latching, the con-

tacts 21-22 are latched open and the contacts 13-14 are latched closed

when the wire cable is being pulled or if it breaks. The contacts can be

unlatched by either pushing the pushbutton or using the key.

It is only possible to unlatch the contacts in the middle position

(pre-stressed position.

Installation

When installing, the switch must be pre-stressed until the switch cam is

in the middle position.

The cable-operated switch must be installed so that safe manual

unlatching is possible.

Before installing the sheathed cable, the sheath must be removed from

the wire cable in the vicinity of the clamps. The wire cable must be

installed according to the installtion instructions.

As the grommet thimble deforms when the wire cable is being pulled,

the wire cable should be vigorously pulled several times after

installation. The tension of the wire cable must be subsequently

regulated by means of either a cable clamp or via the eyebolt or tension

jack.

Due to the tendency of the wire cable to expand when exposed to heat,

the ambient temperature range decreases with increasis cable length.

Order No.: 3ZX1012-0SE70-2AA1

Note

The switch may only be operated by pulling the sheathed cable and

never by removing the mechanism or the drawgear using tools.

The operator must convince himself/herself regularly of the safe func-

tioning of the EMRGENCY STOP device.

Technical data

Standards applied

Enclosure

Cover

Degree of protection

Switching system

Connection type

Cable entry

Cable length

Spring resistances

Mech. service life

Permiss. operating temperature –25°C up to +70°C

Permiss. electr. load

Short-circuit strength

Indicator lamp

Degree of protection

Permiss. electr. load

Installation notes (see Fig. 3A and 3B)

Recommended cable lengths S (m) for safety cable-operated switches

dependent upon ambient temperature range T (°C).

Attention: Cable supports spaced as follows are required:

3SE7150- all 3 m

3SE7140- all 5 m

3SE7120- all 2,5 m

3SE7120-

3SE7140-

3SE7150-

English

IEC 947-5-5/EN 60947-5-5

GD-AL alloy, painted

Impact-resistant thermoplast

IP65 acc. to IEC 529 / EN 60 529

A acc. to IEC 947-5-5

1 NC contact and 1 NO contact, snap

contact

Positively-driven NC contacts

M3.5 scew-type connection;

self-lifting U-bolt

3SE7 140-...00 = 1 x M16x1,5

3SE7 150-...00 = 2 x M20x1,5

3SE7 140-...0 AS = 2 x M25x1,5

3SE7 120-... = 2 x M20x1,5

3SE7 140-... max. 50 m

3SE7 150-... max. 25 m

3SE7 120-... max. 10 m

(observe ambient temperature)

3SE7150- 200N

3SE7120- 55N

> 10

switching cycles

(observe cable length)

400 V AC / 6 A (AC-15)

6 A (time-lag)

Indicator lamp not connectedn

IP65

24 V =, < 45 mA, red